For many weeks I have been working on a custom and completely hand-built calculator.

So let's start with some eye-candy first

(click to show/hide)

The Software is still in the works and nowhere near done.For the CPU I am using an STM ARM CPU which is overclocked to 96 MHz. It also has USB, an SD Card, a Serial / IO port, a 2200mAh LiPo, a Status LED, a Nokia 5110 LCD and a 3x4 keypad.

This looks absolutely fantastic and actually professional (old school too lol). Nicely done and I'm glad it's coming to frution. How far from being done is the software? What's functional in it so far?

Does the calculator produce some heat by the way? You could maybe add some holes on the back of the case near the sides for ventilation (although I'm unsure if it would require adding protection against dust).

This looks absolutely fantastic and actually professional (old school too lol). Nicely done and I'm glad it's coming to frution. How far from being done is the software? What's functional in it so far?

Thanks a lot The Software is in a very early stage. I might actually start from scratch again, so that the Software might be used in a future community calculator. If so, I would make it open source from the very beginning on. The Software would still be monochrome Screen only, however, I don't see a huge need for a color screen to be honest.So far there is a simple four function calc that works well, but has no interesting features except for the Keyboard entry which is working really well and seems to be fairily intuitive.I forgot to mention that I will be porting Claw to it when that one is ready

Does the calculator produce some heat by the way? You could maybe add some holes on the back of the case near the sides for ventilation (although I'm unsure if it would require adding protection against dust).

Actually I don't think it produces any heat really. The only suspect is the screen which is exposed to the outside anyways and can cool off easily and the battery charger, which can cool off after the charge. The CPU is not getting warm.Thanks for suggesting, anyways.

On hiatus until when the sun goes dark in plain day. Might be on once in a while, but don't count on it.Won't have internet on Aug 21-23, so try to not kill each other during that time. YUKI-CHAAAANNNNIn the beginning there was walrii. In the end there will be walrii. All hail our supreme leader --Snektronif you wanna throw money at me and/or CodeWalrus monthly it's here

OMG... if the screen was black with slightly larger res+terminal green fonts, this would totally look like one of those devices from early 80's sci-fi movies. I like it so far as it is, though, and I like the backlit screen. Good job so far

The RPN-Calculator is making progress. I am currently working on a port of GNUMP (which allows huge numbers and accurate fractions) and in the meantime I have improved time keeping and started working on the settings menu.I can't wait to release a new video or at least some pictures soon.Eventually, if there is interest, I will also write a building tutorial if anyone would like to build one of these on their own

The primary new software features are a better operating system kernel and pixel graphics